SEO & AI Glossary
Master the language of modern search. From technical SEO to the latest in Generative AI.
Dark Mode
A color scheme that uses dark backgrounds with light text, increasingly a default option on operating systems, apps, and websites since iOS 13 (2019).
Dark Social
Web traffic that arrives via private sharing channels (messaging apps, email, WhatsApp) that analytics tools misattribute as direct traffic.
Dashboard UI
A category of interface designed for at-a-glance monitoring of multiple data streams: charts, KPI tiles, status indicators, and filters laid out on a single screen.
Data Layer
A JavaScript object (typically `window.dataLayer`) that passes structured data from a website to tag management systems like Google Tag Manager.
Data Visualization UI
A design discipline focused on charts, graphs, maps, and structured displays that make complex datasets quickly comprehensible to humans.
Deep Learning
A subset of machine learning using multi-layered neural networks to model complex patterns in large datasets.
Demand Generation
Marketing activities that create awareness and interest in a product or service, building a pipeline of potential customers who want to learn more.
Digital Marketing
All marketing activities that use digital channels (search, social, email, display, content, and AI) to reach, engage, and convert target audiences.
Digital Marketing Strategy
A plan that defines how a business will use digital channels (search, social, email, content, and paid) to achieve its marketing and business objectives.
Digital PR
A content and link-building strategy that earns media coverage, backlinks, and brand mentions from online publications and journalists.
Disavow File
A file submitted to Google via Search Console that instructs Google to ignore specific backlinks when evaluating a site's ranking.
Display Advertising
Visual banner, image, and video ads served across websites, apps, and platforms through ad networks, typically used for brand awareness and retargeting.
Dofollow Link
A standard hyperlink that passes PageRank and link equity from the linking page to the destination, the default link type unless a rel attribute is specified.
Dofollow Links
Standard hyperlinks without a nofollow attribute, which pass PageRank and anchor text signals from the linking page to the linked page.
Domain Authority
Moz's proprietary 1–100 score predicting how likely a domain is to rank in search engine results, based on its link profile.
Domain Rating
Ahrefs' proprietary 0–100 score measuring the strength of a website's backlink profile relative to all other websites in its database.
Double Opt-In
An email subscription process requiring new subscribers to confirm their email address via a confirmation link before being added to the list.
Drip Campaign
An automated series of emails sent over time, triggered by a user action or schedule, designed to nurture leads toward a conversion.
Duplicate Content
Identical or very similar content appearing at multiple URLs, which can confuse search engines and dilute ranking signals.
Dwell Time
The amount of time a user spends on a page after clicking a search result before returning to the SERP, a behavioural signal Google may use to assess content quality.
Dynamic Ads
Ads that automatically personalise creative elements (images, headlines, products) based on user behaviour, profile data, or a product feed.
Dynamic Rendering
A server-side technique that serves pre-rendered static HTML to crawlers while delivering the normal JavaScript version to users.
Dynamic Search Ads
Google Ads that automatically generate headlines and target queries based on a website's content rather than advertiser-defined keywords.